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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| package binding | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "strings" | ||
| "time" | ||
|
|
||
| mapset "github.com/deckarep/golang-set/v2" | ||
| "github.com/go-logr/logr" | ||
| "github.com/hashicorp/consul/api" | ||
|
|
||
| "github.com/hashicorp/consul-k8s/control-plane/consul" | ||
| ) | ||
|
|
||
| const ( | ||
| oldACLRoleName = "managed-gateway-acl-role" | ||
| oldACLPolicyName = "api-gateway-token-policy" | ||
| ) | ||
|
|
||
| var sleepTime = 10 * time.Minute | ||
|
|
||
| type Cleaner struct { | ||
| Logger logr.Logger | ||
| ConsulConfig *consul.Config | ||
| ServerMgr consul.ServerConnectionManager | ||
| AuthMethod string | ||
| } | ||
|
|
||
| // Run periodically cleans up old ACL roles and policies as well as orphaned inline certificate config entries. | ||
| // When it detects that there are no more inline-certificates and that the old ACL role and policy are not in use, it exits. | ||
| func (c Cleaner) Run(ctx context.Context) { | ||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| case <-time.After(sleepTime): | ||
| } | ||
|
|
||
| client, err := consul.NewClientFromConnMgr(c.ConsulConfig, c.ServerMgr) | ||
| if err != nil { | ||
| c.Logger.Error(err, "failed to create Consul client") | ||
| continue | ||
| } | ||
|
|
||
| aclsCleanedUp, err := c.cleanupACLRoleAndPolicy(client) | ||
| if err != nil { | ||
| c.Logger.Error(err, "failed to cleanup old ACL role and policy") | ||
| } | ||
|
|
||
| if aclsCleanedUp { | ||
| c.Logger.Info("Cleanup complete") | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // cleanupACLRoleAndPolicy deletes the old shared gateway ACL role and policy if they exist. | ||
| func (c Cleaner) cleanupACLRoleAndPolicy(client *api.Client) (bool, error) { | ||
| existingRules, _, err := client.ACL().BindingRuleList(c.AuthMethod, &api.QueryOptions{}) | ||
| if err != nil { | ||
| if err.Error() == "Unexpected response code: 401 (ACL support disabled)" { | ||
| return true, nil | ||
| } | ||
| return false, fmt.Errorf("failed to list binding rules: %w", err) | ||
| } | ||
|
|
||
| oldBindingRules := make(map[string]*api.ACLBindingRule) | ||
|
|
||
| // here we need to find binding rules with the old name that have a matching selector to the new gateway specific binding rule | ||
| // so we first get all the old rules and put them into a map and then ensure we can delete the old rule by finding the new rule that replaces it | ||
| // by matching the selector | ||
| for _, rule := range existingRules { | ||
| if rule.BindName == oldACLRoleName { | ||
| oldBindingRules[rule.Selector] = rule | ||
| } | ||
| } | ||
|
|
||
| rulesToDelete := mapset.NewSet[string]() | ||
|
|
||
| for _, rule := range existingRules { | ||
| if ruleToDelete, ok := oldBindingRules[rule.Selector]; ok && rule.BindName != oldACLRoleName { | ||
| rulesToDelete.Add(ruleToDelete.ID) | ||
| } | ||
| } | ||
|
|
||
| var mErr error | ||
| deletedRuleCount := 0 | ||
| for ruleID := range rulesToDelete.Iter() { | ||
| _, err := client.ACL().BindingRuleDelete(ruleID, &api.WriteOptions{}) | ||
| if ignoreNotFoundError(err) != nil { | ||
| mErr = errors.Join(mErr, fmt.Errorf("failed to delete binding rule: %w", err)) | ||
| } else { | ||
| c.Logger.Info("Deleted unused binding rule", "id", ruleID) | ||
| deletedRuleCount++ | ||
| } | ||
| } | ||
|
|
||
| if mErr != nil { | ||
| return false, mErr | ||
| } | ||
|
|
||
| if deletedRuleCount != len(oldBindingRules) { | ||
| return false, nil | ||
| } | ||
|
|
||
| role, _, err := client.ACL().RoleReadByName(oldACLRoleName, &api.QueryOptions{}) | ||
| if ignoreNotFoundError(err) != nil { | ||
| return false, fmt.Errorf("failed to get role: %w", err) | ||
| } | ||
|
|
||
| if role != nil { | ||
| _, err = client.ACL().RoleDelete(role.ID, &api.WriteOptions{}) | ||
| if err != nil { | ||
| return false, fmt.Errorf("failed to delete role: %w", err) | ||
| } | ||
| c.Logger.Info("Deleted unused ACL role", "id", role.ID) | ||
| } | ||
|
|
||
| policy, _, err := client.ACL().PolicyReadByName(oldACLPolicyName, &api.QueryOptions{}) | ||
| if ignoreNotFoundError(err) != nil { | ||
| return false, fmt.Errorf("failed to get policy: %w", err) | ||
| } | ||
|
|
||
| if policy != nil { | ||
| _, err = client.ACL().PolicyDelete(policy.ID, &api.WriteOptions{}) | ||
| if err != nil { | ||
| return false, fmt.Errorf("failed to delete policy: %w", err) | ||
| } | ||
| c.Logger.Info("Deleted unused ACL policy", "id", policy.ID) | ||
| } | ||
|
|
||
| return true, nil | ||
| } | ||
|
|
||
| func ignoreNotFoundError(err error) error { | ||
| if err == nil { | ||
| return nil | ||
| } | ||
| if strings.Contains(err.Error(), "Unexpected response code: 404") { | ||
| return nil | ||
| } | ||
|
|
||
| return err | ||
| } |
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